html,
body {
  position: relative;
  margin: 0;
  padding: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "微软雅黑", "Helvetica", "STHeiti", "WenQuanYi Micro Hei", "SimSun", "sans-serif";
  color: #fff;
  -moz-user-select: none;
  /*火狐*/
  -webkit-user-select: none;
  /*webkit浏览器*/
  -ms-user-select: none;
  /*IE10*/
  -khtml-user-select: none;
  /*早期浏览器*/
  user-select: none;
  height: 100%;
  width: 100%;
  background: #001338;
}

.title_bar {
  position: fixed;
  height: 120px;
}

svg {
  color: #fff;
}

img.back {
  display: block;
  width: 100%;
}
.tmp_block{
  width: 100%;
  height: 50vw;
}